He's mostly uneducated, and a lot of uneducated people are superstitious. Answer: You've got to take into account the time and setting of the story. In the mid-1800's most people in the poor southern states had a significant amount of superstition in their lives - diseases were the result of toads, dog's baying at the moon were harbingers of death and warts were cured with rituals in the dead of night. This is how Twain remembers his boyhood and uses these memories to make the story seem alive.
Huck and Jim believe in various superstitions, such as the bad luck that comes with touching a snake's skin or seeing the moon over your left shoulder. They also believe in omens, like seeing a spider along with other bad signs indicating bad luck. These superstitions reflect their belief in the supernatural and their reliance on signs and symbols to understand the world around them.
One of the tricks Huck plays on Jim is pretending that their separation and Huck's adventure with the Duke and Dauphin was just a dream, leading Jim to believe that he dreamed about Huck getting lynched. It plays with Jim's emotions and causes him distress before revealing the truth.
Jim believes that Huck is a ghost because he previously thought that Huck had died. Huck's unexpected return led Jim to believe that he had come back as a ghost. This reflects Jim's superstitious beliefs and fear of the supernatural.
Huck doesn't turn Jim in because Jim in Huck's first TRUE friend. Jim is also the only "family" Huck has ever had that cares so much about him and will protect him.
After being separated by a fog, Huck wakes up and sees Jim sleeping on the raft. He ties the canoe back to the raft and lays at Jim's feet, pretending to be sleeping. When Jim wakes, Huck pretends that Jim dreamt the whole fog incident. When Jim finds out Huck is pranking him, he is offended. He says that after all the work of trying to find Huck and calling for him, he didn't care about himself or the raft, only about Huck's safety. When he woke up and saw Huck alive, he was so happy he could have kissed Huck's feet. All that time all Huck cared about was making Jim look like a fool. After Jim says this, Huck sees how mean his prank was and feels so bad he could have "kissed his foot to get him to take it back." He apologizes to Jim.
The young boy warns Huck that people are looking for Jim because he has run away. He tells Huck that Jim is suspected of murdering Huck.
You should not believe in Superstitions. Superstitions is the product of ignorance among people. Many superstitions are not true.
Yes, anybody that wishes to believe in superstitions can.
Jim is initially startled when he sees Huck on the island, as he believes that he has seen a ghost. However, he quickly realizes that Huck is alive and is relieved to be reunited with him. Jim is happy to see Huck safe and well.
Jim is initially angry at Huck for playing a trick on him, but he eventually forgives him after seeing how upset Huck is. Jim understands that Huck didn't mean any harm and values their friendship more than holding a grudge.
Huck liberated Jim and helped Jim realize who he was!
No clue
They kill it. Later, Huck takes the dead rattlesnake and puts it in Jim's bedroll as a prank. The rattlesnake's mate lays next to the dead snake and strikes Jim when he is going to sleep. Jim survives. Jim and Huck believe it is bad luck to touch the skin of a snake. All of the hard times they encounter on their adventure they attribute to bad luck from touching the snake.